Modbus Interface Specification; Modbus Physical Layer; Modbus Registers; Control And Status Registers - IntesisBox ME-AC-MBS-1 User Manual

4. Modbus Interface Specification

4.1 Modbus physical layer

ME-AC-MBS-1 implements a Modbus RTU (Slave) interface, to be connected to an EIA-485 line.
It performs 8N2 communication (8 data bits, no parity and 2 stop bit) with several available
baud rates (2400 bps, 4800 bps, 9600 bps -default-, 19200 bps, 38400 bps, 57600 bps, 76800
bps and 115200 bps). It also supports 8N1 communication (8 data bits, no parity and 1 stop
bit).

4.2 Modbus Registers

All registers are type "16-bit unsigned Holding Register" and they use the standard Modbus big
endian notation.

4.2.1 Control and status registers

Register Address
(protocol address)
0
1
2
3
4
5
1 Available values will depend on the AC unit mode. Check the AC unit model functions in its User's Manual to know the possible values
for this register.
2 Magnitude for this register can be adjusted to Celsius x 1ºC, Celsius x 10ºC (Default) or Fahrenheit. See section 4.2.3 for more
information
3
It is not possible turn to x10 the value shown in Fahrenheit.
© Intesis Software S.L.U. - All rights reserved
This information is subject to change without notice
IntesisBox ® is a registered trademark of Intesis Software SLU
ME-AC-MBS-1
Register Address
(PLC address)
1
2
3
4
5
6
R/W Description
AC unit On/Off
R/W
0:Off
▪
1:On
▪
AC unit Mode
0:Auto
▪
1:Heat
▪
R/W
2:Dry
▪
3:Fan
▪
4:Cool
▪
AC unit Fan Speed
0:Auto
▪
1:Low
▪
R/W
2:Mid-1
▪
3:Mid-2
▪
4:High
▪
AC unit Vane Position
0:Auto
▪
1:Horizontal
▪
2:Position-2
▪
R/W
3:Position-3
▪
4:Position-4
▪
Vertical
▪
Swing
▪
AC unit Temperature Setpoint
-32678 (Initialization value)
▪
R/W
16..32ºC (ºC/x10ºC)
▪
61..90ºF
▪
AC unit Temperature reference
-32678 (Initialization value)
▪
R
10..38ºC (ºC/x10ºC)
▪
50..100ºF
▪
URL
Email
Phone
User's Manual r21 EN
1
1
1
1,2,3
1,2,3
http://www.intesisbox.com
info@intesisbox.com
+34 938047134
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